(1)In this Part “terrorist” means a person who—
(a)has committed an offence under any of sections 11, 12, 15 to 18, 54 and 56 to 63, or
(b)is or has been concerned in the commission, preparation or instigation of acts of terrorism.
(2)The reference in subsection (1)(b) to a person who has been concerned in the commission, preparation or instigation of acts of terrorism includes a reference to a person who has been, whether before or after the passing of this Act, concerned in the commission, preparation or instigation of acts of terrorism within the meaning given by section 1.
(1)A constable may arrest without a warrant a person whom he reasonably suspects to be a terrorist.
(2)Where a person is arrested under this section the provisions of Schedule 8 (detention: treatment, review and extension) shall apply.
(3)Subject to subsections (4) to (7), a person detained under this section shall (unless detained under any other power) be released not later than the end of the period of 48 hours beginning—
(a)with the time of his arrest under this section, or
(b)if he was being detained under Schedule 7 when he was arrested under this section, with the time when his examination under that Schedule began.
(4)If on a review of a person’s detention under Part II of Schedule 8 the review officer does not authorise continued detention, the person shall (unless detained in accordance with subsection (5) or (6) or under any other power) be released.
(5)Where a police officer intends to make an application for a warrant under paragraph 29 of Schedule 8 extending a person’s detention, the person may be detained pending the making of the application.
(6)Where an application has been made under paragraph 29 or 36 of Schedule 8 in respect of a person’s detention, he may be detained pending the conclusion of proceedings on the application.
(7)Where an application under paragraph 29 or 36 of Schedule 8 is granted in respect of a person’s detention, he may be detained, subject to paragraph 37 of that Schedule, during the period specified in the warrant.
(8)The refusal of an application in respect of a person’s detention under paragraph 29 or 36 of Schedule 8 shall not prevent his continued detention in accordance with this section.
(9)A person who has the powers of a constable in one Part of the United Kingdom may exercise the power under subsection (1) in any Part of the United Kingdom.
(1)A justice of the peace may on the application of a constable issue a warrant in relation to specified premises if he is satisfied that there are reasonable grounds for suspecting that a person whom the constable reasonably suspects to be a person falling within section 40(1)(b) is to be found there.
(2)A warrant under this section shall authorise any constable to enter and search the specified premises for the purpose of arresting the person referred to in subsection (1) under section 41.
(3)In the application of subsection (1) to Scotland—
(a)“justice of the peace” includes the sheriff, and
(b)the justice of the peace or sheriff can be satisfied as mentioned in that subsection only by having heard evidence on oath.
(1)A constable may stop and search a person whom he reasonably suspects to be a terrorist to discover whether he has in his possession anything which may constitute evidence that he is a terrorist.
(2)A constable may search a person arrested under section 41 to discover whether he has in his possession anything which may constitute evidence that he is a terrorist.
(3)A search of a person under this section must be carried out by someone of the same sex.
(4)A constable may seize and retain anything which he discovers in the course of a search of a person under subsection (1) or (2) and which he reasonably suspects may constitute evidence that the person is a terrorist.
(5)A person who has the powers of a constable in one Part of the United Kingdom may exercise a power under this section in any Part of the United Kingdom.